/***
 * ASM: a very small and fast Java bytecode manipulation framework
 * Copyright (c) 2000-2007 INRIA, France Telecom
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holders nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.rsbot.loader.asm.commons;

import org.rsbot.loader.asm.AnnotationVisitor;
import org.rsbot.loader.asm.Label;
import org.rsbot.loader.asm.MethodVisitor;

/**
 * A <code>MethodAdapter</code> for type mapping.
 *
 * @author Eugene Kuleshov
 */
public class RemappingMethodAdapter extends LocalVariablesSorter {

	protected final Remapper remapper;

	public RemappingMethodAdapter(
			int access,
			String desc,
			MethodVisitor mv,
			Remapper renamer) {
		super(access, desc, mv);
		this.remapper = renamer;
	}

	public void visitFieldInsn(
			int opcode,
			String owner,
			String name,
			String desc) {
		super.visitFieldInsn(opcode,
				remapper.mapType(owner),
				remapper.mapFieldName(owner, name, desc),
				remapper.mapDesc(desc));
	}

	public void visitMethodInsn(
			int opcode,
			String owner,
			String name,
			String desc) {
		super.visitMethodInsn(opcode,
				remapper.mapType(owner),
				remapper.mapMethodName(owner, name, desc),
				remapper.mapMethodDesc(desc));
	}

	public void visitTypeInsn(int opcode, String type) {
		super.visitTypeInsn(opcode, remapper.mapType(type));
	}

	public void visitLdcInsn(Object cst) {
		super.visitLdcInsn(remapper.mapValue(cst));
	}

	public void visitMultiANewArrayInsn(String desc, int dims) {
		super.visitMultiANewArrayInsn(remapper.mapDesc(desc), dims);
	}

	public void visitTryCatchBlock(
			Label start,
			Label end,
			Label handler,
			String type) {
		super.visitTryCatchBlock(start, end, handler, //
				type == null ? null : remapper.mapType(type));
	}

	public void visitLocalVariable(
			String name,
			String desc,
			String signature,
			Label start,
			Label end,
			int index) {
		super.visitLocalVariable(name,
				remapper.mapDesc(desc),
				remapper.mapSignature(signature, true),
				start,
				end,
				index);
	}

	public AnnotationVisitor visitAnnotation(String desc, boolean visible) {
		AnnotationVisitor av = mv.visitAnnotation(remapper.mapDesc(desc), visible);
		return av == null ? av : new RemappingAnnotationAdapter(av, remapper);
	}

	public AnnotationVisitor visitAnnotationDefault() {
		AnnotationVisitor av = mv.visitAnnotationDefault();
		return av == null ? av : new RemappingAnnotationAdapter(av, remapper);
	}

	public AnnotationVisitor visitParameterAnnotation(
			int parameter,
			String desc,
			boolean visible) {
		AnnotationVisitor av = mv.visitParameterAnnotation(parameter,
				remapper.mapDesc(desc),
				visible);
		return av == null ? av : new RemappingAnnotationAdapter(av, remapper);
	}

	public void visitFrame(
			int type,
			int nLocal,
			Object[] local,
			int nStack,
			Object[] stack) {
		super.visitFrame(type, nLocal, remapEntries(nLocal, local), nStack, remapEntries(nStack, stack));
	}

	private Object[] remapEntries(int n, Object[] entries) {
		for (int i = 0; i < n; i++) {
			if (entries[i] instanceof String) {
				Object[] newEntries = new Object[n];
				if (i > 0) {
					System.arraycopy(entries, 0, newEntries, 0, i);
				}
				do {
					Object t = entries[i];
					newEntries[i++] = t instanceof String
							? remapper.mapType((String) t)
							: t;
				} while (i < n);
				return newEntries;
			}
		}
		return entries;
	}

}
